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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bacf0156b7c47281323ad869a62a41ef159e46c9b8ebf82d5741bffaf174397' 
  AND token = 'NctMI+cEs/eoEstnP3CvSCndlOautIdCWvn4o5JoQqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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