Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd875e50bf6bb5215cdf052222b4638f37b32db344370a346a1ae8067b90dd2c4' 
  AND token = 'DcSXI8PtIFpIDx5xkCzsN3JXohOwtFA6/Ip10q2CSWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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