Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cfd33c24837c7dc240859665b89ff33766194baec0ecad47269ef2ccdcd7499' 
  AND token = 'twAYJnlP/MAD24EI7RPpzXMU/5osm+me9OF4vuTu6c4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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