SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64259d42509b3861424dbe03a59a0f2941371590b61eca8f088858dd1b14472c' 
  AND token = 'hyoJJhLsnv++T7xK5x5LhP/GTdDNTuxn0Ky7zVjzktg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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