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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7efacdbcb44bbbfeaf9a2ab9f38c07fef31a27cd635c93c3f119fd1de1c8822' 
  AND token = 's5k4yjiN2FXX46qkj6dyZtAYFypq6suAmHPgm1G4euA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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