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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '951042fc15452127e031090f5e8611bf478a39f001d9ba6b2f39fea77cf0b883' 
  AND token = 'ua+z+fboqxsDsylrkIDpjJ2bZdKof/Qb5xHqkDk0Nss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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