Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f3eb3f95bd4ada325729af503cbe98110663a875c3a3f9393e2fcfa3605c33b' 
  AND token = 'kbxE45YniYhhxDn9KHLUCvFq/Pnf1CcDSshhkdRESs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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