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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ddd24bf479d8bdb6dd0a0e6160a28359b271c6daa35d47c592c2cf78192585a' 
  AND token = 'G8sVlHEcCqO/N3fYXwePdcWTnbLLeYony/GXmjEWkBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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