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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '13f1dcd221e118ecf83a16a8349f9f2b38e1c9beb2e7f9c2bf1167643de3d805' 
  AND token = 'Qea3GAEtXbFjKFpCZPdrXVDbZQ0uSrPGyVxI9l/7Py4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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