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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59a73170f8d3d370779642c770e03ce56f18acc7d82843c54a6d6c9aaae0dcc8' 
  AND token = 'lhLhugs/fkdIC2Kl/KUVVYQZDEVN8kDcOMwk5EflWZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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