Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '864be827f003870eb711249c5e1824eb18bdacb017f3776952dd78ac0a9863f1' 
  AND token = 'V2Xo1W+yjqJszTImnJIE7q2bZjRNktz/m51vLLtsEsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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