Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83ae1012938412d45b5d722bd6e2b4c194ada1799e2261897364a16b84662575' 
  AND token = '4JVWWgjCuprm7e+DP/VEeWFtpaNqdjLnJgSM0pWjydk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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