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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c590282d7f73d0fa60e97d485133e095ac305d70acca2324bd26e84990cc2bd5' 
  AND token = '07m1I8ETQU73aYc5I6iqPdEfcS3uu6z/hEmTdWiRiI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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