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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '065fb2d7805419b2fd60fcde7b977a04e78a488b631687ee47361d8e34a8c139' 
  AND token = 'iaKIuYQnx6QMnSTqfeYEDep1LsD7BNq1VzRYomD6Cwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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