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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1aebdc00700590c4e0bcef7148191cce99c8ae8f3b96e95c246f07438cf3dc9' 
  AND token = 'UweMJMeqZDqeaeeimKYPHFlDCXRLIxEMe/2TaVIUKEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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