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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf2617159e0c98eee907ce05c52dd13ec8bd9651dfa8cf31f8e2326732151b44' 
  AND token = 'GZVHAD2OIrnaNoPF/u1aWzRaEBwEPvDPWs5QqmTwhdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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