SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '694ac7a9bfd226bdc56590e845933eb18b769c932ac94bdd0ab9189932177b82' 
  AND token = 'kZlqZRizKDmu2ioWOc/PAjG4Tjz52Pi13XfznZgvwiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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