Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c8a4eeed3048a0e2ea1a30288527b38c862cd332a4b467ed0c6a9b0f67e0ebd' 
  AND token = 'vTJOtXwSSSB5NX0Uodp7jHRnI9QhkjznwgYwLrO02Do=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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