SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7162356cbe7e668c9a862ca0304ab55a24d764672f89fb979f6a8e37b9ff92a1' 
  AND token = 'dEp5GHJkdlE2iwZcvB1SgFzH3shEY751O9vXESYu+VQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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