Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e478f0888230a89fa210d9ff2fa782e052319725749f93cb84ba5bbb6329d87' 
  AND token = '5h09lDiL6JwE9aSRjLsdo0yB80/P/Y/x0wsQKC2izbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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