Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09ce4daf75ba3f946e4ec5ded76488f0511f29745b5d02a11644ab9f7b8cd7d4' 
  AND token = 'CFViPxphFrp1cQIR0mds4fA9c+mWsnhljUbv3efXHXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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