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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0719f60af166a66aef292ff5e09b931742a843619f394b2441cccc5006e2996e' 
  AND token = '0PUGdOaC7vJQtN4lGnIAminwlvfZt+eC2o9/1Ekc/N0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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