Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'be5a8f618e3d78b4b6b9764a6d430ec8c8fdd0b555d1d655fcc512c5c3c47e5f' 
  AND token = 'S9Xt/tBL3Mg8rffvmw7R4+SBmg25N4j6lyVD4eSAv1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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