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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '13202cf116c11d72455dfce7e56f940c450707848e5ffacd36628fe06abcd228' 
  AND token = 'UQIFfaFR1q/h0PQFhm/5tN6TJunZLpWV1co61+yENOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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