Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f16261098fb6b0ae712535123bff93d92b1732e2ec8fd19810f292036ff6b328' 
  AND token = 'WRlb3EirP8ZkModuwe4FodJOVBp4uKGgcVaJmaCyAa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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