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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '711dccf5e65d4e4ca51fc60c27acf0a30b35dbb134f5c38a430405c4ccc070b4' 
  AND token = 'Iii2cR624x7q6lqb5UNtlPlwaevlygIpSUbb/kVupIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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