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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7a8e633089a5d57a0cf17a767d107f232de4fbb29e03a7fb137b1133abffe1d' 
  AND token = '6ksc6Fdo6zOX3IeA1j/tqIebeCAU5xhsVRDBg2JV6cM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}