Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c25f0b2681b2aacabd32e8fffa4d0ff725b06bcb675ec61c44488e13992afa80' 
  AND token = 'IGcGQDGM7eXeBStpxqN307kq9pGTByibwuPbzeatgVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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