Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca203c768a0dec70d6dc3cbd893fb8000ecc1183ba6ba98842d65436e329dd76' 
  AND token = 'spNLzW5e28J7HGvFmo9UhgjFF/pOHo24132vYTziAOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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