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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adfcc8f1db41b46b9ef6f8100ae2b1b43b86bf82608a4a5c5693a84e10b68fe7' 
  AND token = '5o0+KBQm2Ve0eWJvFlTORMqJAf0S+QcD3JjLvFchnxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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