Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1675a4667cb8384996e5232ad0c48fa66569d1b6955223e2bcbf5fe88b7a67a9' 
  AND token = 'WrnqoMAzOEiIjL1vnpnMpslA1wHzdJjx8p8nCPZgr70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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