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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '117465036ae2da9c00dc60b0d374320aa6f6d9e75178a8f34bbd2e92a60ec179' 
  AND token = 'SWnFUrpz97EylwmWNgHX+7fge24hhRcfbT/dw8UqpB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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