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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d54edb08ce5f457537a1da3ff185ee0748cb2eea83447e5f586f402e2f523e2' 
  AND token = 'un4pamCImrKmj3dJ7QnYNC+cjuMt44H3yFCWJ0tRsTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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