SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5927c48f00258a78b0a42d6c7fe305b8b279b94408a49db50469cfa4c262e1c9' 
  AND token = 'NhoGMgcPmzF4PYnpmDHWaxqP3svjsh4YRVQ4O2CACd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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