Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4236e2a87908cb3ecea22ada5df106fefaf69f5ec8142d2a51c950f56b0a3dc8' 
  AND token = 'IxZ2bvy57MXCecZhrlnhSB0Vpbj341LoQwdnI551lI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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