Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a31a84a74d7beb7fc2dbeb68b4c19d95e4e1e098c04909d0166b7491cd8a4de' 
  AND token = 'kPLsIQpPsa0n6ElbQxLfJ5QWzPBP4bt1o4F1i4o+AO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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