Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d0ec4684aaf6f778df762b05abd2df78e8aa3de8d0fd2b0ebc6f33bf222ee73' 
  AND token = '18vhji6i3k1h4PuS2HtKcntQ0RoBHCs8zoX76wYFTcE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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