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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed1dbe047abf257fb77fb439c1c9cb04b6047e22e0d24b74e9f99839d1bc2307' 
  AND token = 'zsNGOcIDYEz+G/RrHen4kjOTfooBqfNMP3hzy6rIKvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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