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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60bf815a657f1cc463c615929657c5cc48f153239e7250f9cdf43e1a30145f7b' 
  AND token = 'od5fi4mPF7fv6RHSwUdDJaif2NX2R6pOS9wjS9KTHRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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