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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc0402c3153c9da8fa16b355dbfab69d5a480150ab8aef9ac10b6411429b9ff8' 
  AND token = 'N9Up6rx2CWJkZG0yqFhGI2NJZlLWK4X9e6uFHz2STLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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