SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daf022e8fb7b3869045f3a6a2aa9d3c26e3b2e7b1368cf0acd13f2359885a1cb' 
  AND token = 'fuo3PuJ4NiY5FbS4KdzwZuUFDZHcihHjhYqSBg6aaPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}