Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '43e2cd1008fce57c912497947427f0952f1d38670ef742836d31c6a3b7a44d6f' 
  AND token = 'DIjLnFlR09rjSTD4Z4imcYIcufDPmf4jH4E5HyG1odg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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