Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a0a1eeb2f2d93bde62800a9ed77ebdc039744bb5ea3ff8a4353e9e47cc95c0f0' 
  AND token = 'GcK79rJwCy8VTwYnAZfRK/hUEJRWD3g5xk0JJROwrtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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