Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f45fb4f99296b55db304f448cd7f131ebd19266a8bd85f14204150b7c4b8e844' 
  AND token = '6TNjhKnijdB5x3k1FKI8hHfWateP/rDQM/v/YjtHpFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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