SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05340db49927a76f75f0449a540a034b0272d1d90fa276d142b3591ea0307478' 
  AND token = 'Ju4mgarQ7PYhc+AD6QBQW80loGilqS8oq1JSwXdnmvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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