Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c44cf70aa3616d62d2a38cbc928fe0e8220c5a32927f5f88ae4b4aabab588a36' 
  AND token = 'MIz1qgNOrlUrak/1pik23qTfzgu7CH8oY0s/HdWGiAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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