Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c40e12f8634881adf8b409cfe766b19588c110467d7bdd4f281e10c23465fed' 
  AND token = 'DH//L3zrVHsenKaDnsA630OpOmSHaRBFU1X6YN546XY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}