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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fca6a5c5f248caf43267a3a2e407826291c2739e5b0f8df311801e8b7e691fb8' 
  AND token = 'tN1WXRrmG05z+l/PKktkURxAkF7OuedEHT0BNI8jRCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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