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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63070b8423750c8144863b6b6e555037fe561b7a9d1aa0e1980ee710ba65e320' 
  AND token = '80i3MtLEenKV7Q1Il4sB9YmLllri1PvPFHmxO+/0+nw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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