Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '345ac772eb6ac0ff174f962517390654eb52f5635e1f3bd6bab1aef8f855e387' 
  AND token = 'RSK33hyW4WhnV0vb1b0dwOPITnH0X3aVCIOP9qnWBYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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