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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8deabff0f86ee1f92b42f61fec0568660768275b4d95d3c92ef1f06648d5ef75' 
  AND token = 'hyckUQB05l3uaPGvX+rlIWW2zZBYulGoYQrETrZT6SU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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