Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a39622ae7facdf6a8de3ac51a64ab2cc285e78a5012a5c81272c4c7e5e728092' 
  AND token = 'y2Jmp75D0fBr71yW75ZX3MvlDK6PKiD1L2iMTi6p6bo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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