Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f00e391ed73ecf4e965dc1c40c0acf513e99b20faf5193dcd9c4cfce144d6831' 
  AND token = '+oSiZuitVk5g5xwP0qf66379g1CMtgQYxA9gRoomS4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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