Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdc96ca82e276bb04501e5437253a1ebfbe12cc288b97da373bc12b33d84bbc3' 
  AND token = 'Nc+cXNkFzqniqnLtrqwYr+bmOfbECRDC+My9YPMK9eg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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