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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ad49b4c28d3177d442484ca03769fb6b3ff48398c6b5a6f6e26c29561ae44af4' 
  AND token = 'bdNoWV8yBe3/n5zR1xf3CNu3EtvezU8spIT6C6p7Agw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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