SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd2d1706b3bf704c924219c678439776f598458f8908be2fff4fcd3c06765adaf' 
  AND token = 'KGizug5CjWphSPSTV/IbvR7oY/FLHb6LYRr+WhRSwVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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