SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4c533f4cde3d1745347532ca6e3f523f87fde778a4af1e2960af542e0b57716' 
  AND token = 'wxgGhZTkPOZ9zLOV/i4YALGzZqMvIaaDHHXvG97p8P0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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