SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c81b87072fd231ab9c834be40df6904b2639fe8580c5d23849dc1cd19cf08ea' 
  AND token = 'jY4Yk2/XzFeL+CCJM9BpHpOApDJV73JxLh5LPjXFVuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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