Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8703ea06b9bb62c29bbe6d4850e81e0772aa6a70b8de91bf3c2e6cbec42ea9c0' 
  AND token = 'FpfK/sZNH5IjSkxjZF9BTe+XF15bvD9T+ERsYabOhMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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