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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '97106d22dbae643fa9783e97a6af08cf87c79c9c1ed044ec8542de3822182409' 
  AND token = 'tK2U/QnmigR16GpS+d6FAwgZx99OETDtJ12MxBJITjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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