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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '380d202641082f77c019f80fc174d86acb419f7f4b2d382fd064a0e7ab775d1b' 
  AND token = 'sVK0b6V3O5rEBtj3QEpdCJv9Q5cJDD35LJcQtD9hcmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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