Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0fcaf23ddb7c8d60b49e06fcd155802ff38c44bd1c8c10d2ee7ce2e8f4232fd8' 
  AND token = 'AOjUzfanBx1F1Cuv6UeF8mkHunmYGajSQ9fYYdNUvU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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