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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '37a3dcf2fe82eb79ed3849bb8f2e59dfe2aed465700533ae3f65b70b9442700a' 
  AND token = 'Z0CNpAJfy35tjrTuOTAJA4SHzU0qpWZkTDnyiH7Swbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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