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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '632cad6b4c66a27090f7e842a82eed3c37cc88c372e78ead748cc55221a3b6ae' 
  AND token = 'GYytrye8Yvbu04eaTvpHkgm9eV8aM2dM7HAloE5R7Lw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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