Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c26d6601ac88a51692434af67918516a2678f92cb5865d2c5d73e6ef3a422498' 
  AND token = 'xOeZFMisUNEViiRwCJh2M1xvtlekXuUTOogwybUjFbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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