Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49ee812dc80cf7247ad6ac8f0164c2fa5b756dae02d06e7c965ff938f56ba3cd' 
  AND token = 'EsfikcwZuncD1S9AeH5iEjbKQb25Rv8/pqq2NN4N9pk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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